What are the classifications of cleft lip and cleft palate?

Cleft lip and cleft palate can be classified according to severity into isolated cleft lip, isolated cleft palate, and cleft lip and palate; the classification varies depending on the extent of involvement. A first-degree cleft lip involves only the vermillion border of the lip, while a second-degree cleft lip extends to the white lip but does not involve the nasal base. With early and active treatment, cleft lip and palate can achieve excellent outcomes, effectively enabling patients to return to normal life.